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<meta name="description" content="The Flow PanelLayout arranges panel elements in rows or columns."/> 
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<title>Flow PanelLayout</title>
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          <h1 class="mb-0 p-1 ">GoJS</h1>
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    <!-- Start of GoJS sample code -->
    

    <div class="p-4 w-full">
<div id="sample">
  <div id="myDiagramDiv" style="border: solid 1px black; width:100%; height:600px"></div>
  <p>
    Each node has a "Flow" PanelLayout below the shape listing a bunch of text values in rows.
  </p>
  <p>
    The context menu shown for each node has three "tabs", each showing some number of shape figures,
    one of which the user can click to replace the node's shape's figure.
    These tab panels use a "Flow" PanelLayout to arrange the shapes in columns,
    by setting <a>PanelLayoutFlow.direction</a> to 90.
    Note how for a custom <a>PanelLayout</a> one cannot use its name directly,
    but must construct and initialize an instance of the PanelLayout.
  </p>
</div>

<script type="module" id="code">
  import * as go from "../release/go-module.js";
  import { PanelLayoutFlow } from "./PanelLayoutFlow.js";

  if (window.goSamples) goSamples();  // init for these samples -- you don't need to call this
  const $ = go.GraphObject.make; // for conciseness in defining templates

  const myDiagram =
    $(go.Diagram, "myDiagramDiv",
      { "undoManager.isEnabled": true });

  myDiagram.nodeTemplate =
    $(go.Node, "Vertical",
      $(go.TextBlock,
        { font: "bold 10pt sans-serif" },
        new go.Binding("text")),
      $(go.Shape,
        {
          width: 40, height: 40,
          fill: "white",
          portId: "",
          fromSpot: go.Spot.LeftRightSides, toSpot: go.Spot.LeftRightSides
        },
        new go.Binding("fill", "color"),
        new go.Binding("figure").makeTwoWay()),
      $(go.Panel, "Flow",
        new go.Binding("itemArray", "values"),
        {
          maxSize: new go.Size(40, NaN),
          background: "transparent",
          itemTemplate:
            $(go.Panel,
              $(go.TextBlock,
                { font: "9pt sans-serif", margin: new go.Margin(1, 1, 0, 1) },
                new go.Binding("text", ""))
            )
        }
      )
    );

  myDiagram.nodeTemplate.contextMenu =
    $(go.Adornment, "Table",
      { background: "gray", defaultAlignment: go.Spot.Top, padding: 10 },
      $(go.Panel, "Vertical",
        { column: 0, stretch: go.GraphObject.Vertical, defaultStretch: go.GraphObject.Horizontal },
        makeTabLabel("A Figures", true),
        makeTabLabel("B Figures"),
        makeTabLabel("C Figures")
      ),
      $(go.RowColumnDefinition, { column: 1, width: 10 }),
      makeFlowPanel("A Figures", ["Square", "Circle", "RoundedRectangle", "Diamond"], true),
      makeFlowPanel("B Figures", ["TriangleUp", "TriangleRight", "TriangleDown", "TriangleLeft"]),
      makeFlowPanel("C Figures", ["LineH", "LineV", "BarH", "BarV", "MinusLine", "PlusLine", "XLine"]),
    );

  function makeTabLabel(name, selected) {
    return $(go.TextBlock, name,
      {
        margin: new go.Margin(2, 2, 0, 2),
        mouseEnter: function(e, tb) {
          var ad = tb.part;
          if (ad.selectedTextBlock === tb) return;
          if (ad.selectedTextBlock) {  // this keeps a reference to the selected TextBlock
            ad.selectedTextBlock.background = null;
            var oldpan = ad.findObject(ad.selectedTextBlock.text);
            if (oldpan) oldpan.visible = false;
          }
          ad.selectedTextBlock = tb;
          tb.background = "white";
          var newpan = ad.findObject(tb.text);
          if (newpan) newpan.visible = true;
        }
      });
  }

  function makeFlowPanel(name, figures, selected) {
    return $(go.Panel, $(PanelLayoutFlow,
      { spacing: new go.Size(5, 5), direction: 90 }),
      {
        name: name,
        column: 2,
        maxSize: new go.Size(NaN, 130),
        visible: !!selected
      },
      figures.map(makeShape)
    );
  }

  function makeShape(fig) {
    return $(go.Shape, fig,
      {
        width: 30, height: 30,
        fill: "white",
        background: "transparent",  // to catch a click anywhere in bounds
        click: function(e, shape) {
          var ad = shape.part;
          e.diagram.commit(function(diag) {
            diag.model.set(ad.data, "figure", fig);
            ad.adornedPart.invalidateConnectedLinks();
          }, "modified figure");
        }
      });
  }


  myDiagram.model = new go.GraphLinksModel(
    [
      { key: 1, text: "Alpha", color: "lightblue", values: ["A", "B", "C", "D", "E", "F", "G", "H"] },
      { key: 2, text: "Beta", color: "orange", figure: "Diamond", values: ["I", "J"] },
      { key: 3, text: "Gamma", color: "lightgreen", figure: "Circle", values: ["123", "456", "7890"] },
      { key: 4, text: "Delta", color: "pink", figure: "Triangle" }
    ],
    [
      { from: 1, to: 2 },
      { from: 1, to: 3 },
      { from: 3, to: 4 },
      { from: 4, to: 1 }
    ]);

  window.myDiagram = myDiagram; // Attach to the window for console debugging
</script>
    </div>
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    <!--  End of GoJS sample code  -->
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